Copyright>        OpenRadioss
Copyright>        Copyright (C) 1986-2023 Altair Engineering Inc.
Copyright>
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Copyright>
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Copyright>        Commercial Alternative: Altair Radioss Software
Copyright>
Copyright>        As an alternative to this open-source version, Altair also offers Altair Radioss
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Chd|====================================================================
Chd|  FXBSYS                        source/constraints/fxbody/fxbsys.F
Chd|-- called by -----------
Chd|        FXBODVP1                      source/constraints/fxbody/fxbodvp.F
Chd|-- calls ---------------
Chd|        ARRET                         source/system/arret.F         
Chd|====================================================================
      SUBROUTINE FXBSYS(MT, ST, N)
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER N
      my_real
     .   MT(N,*), ST(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I,II,I1,M,K,INFO,IPIV(N)
#ifndef MYREAL8
          DOUBLE PRECISION :: MTDB(N,N)
          DOUBLE PRECISION :: STDB(N)
#endif
C
#ifdef WITHOUT_LINALG
      WRITE(6,*) "Error: Lapack needed for Flexible bodies"
      CALL FLUSH(6)
	  CALL ARRET(5)
#else
#ifdef MYREAL8
      CALL DGETRF(N,N,MT,N,IPIV,INFO)
      CALL DGETRS('N',N,1,MT,N,IPIV,ST,N,INFO)
#else
      MTDB(1:N,1:N) = MT(1:N,1:N)
      CALL DGETRF(N,N,MTDB,N,IPIV,INFO)
      STDB(1:N) = ST(1:N)
      CALL DGETRS('N',N,1,MTDB,N,IPIV,STDB,N,INFO)
      ST(1:N) = STDB(1:N)
#endif
#endif
C      
      END
